Re: 2.6.15-mm4 failure on power5

[Serge E. Hallyn]

Quoting Dave C Boutcher (sleddog@xxxxxxxxxx):
> On Mon, Jan 16, 2006 at 09:37:48AM -0600, Serge E. Hallyn wrote:
> > Quoting Michael Ellerman (michael@xxxxxxxxxxxxxx):
> > > On Mon, 16 Jan 2006 18:05, Andrew Morton wrote:
> > > > "Serge E. Hallyn" <serue@xxxxxxxxxx> wrote:
> > > > > On my power5 partition, 2.6.15-mm4 hangs on boot
> > 
> > boot: quicktest
> > Please wait, loading kernel...
> 
> ...
> 
> > Page orders: linear mapping = 24, others = 12
> >  -> smp_release_cpus()
> >  <- smp_release_cpus()
> >  <- setup_system()
> > 
> > So setup_system() at least finishes, though I don't see the
> > printk's at the bottom of that function.
> 
> 2.6.15-mm4 won't boot on my power5 either.  I tracked it down to the
> following mutex patch from Ingo: kernel-kernel-cpuc-to-mutexes.patch
> 
> If I revert just that patch, mm4 boots fine.  Its really not obvious to
> me at all why that patch is breaking things though...

FWIW this fixes mine as well.

-serge
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